/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMesh3.h
Clones the given vertex and updates any provided triangles to use the new vertex if/where they used the old one.
Ok on success, or enum value indicates why operation cannot be applied. Mesh remains unmodified on error.
virtual [EMeshResult](API\Runtime\GeometryCore\UE__Geometry__EMeshResult) SplitVertex ( int VertexID, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const int > & TrianglesToUpdate, [FVertexSplitInfo](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3\FVertexSplitInfo) & SplitInfo )